> Even if the " " variant is faster, it does not matter if its output
> is incorrect ;-)


> I think we discussed this already?  The conclusion was it is silly
> for GCC to warn on -Wformat-zero-length for user-defined function in
> the first place, IIRC.  func(other, args, fmt,...), when invoked as
> func(other, args, ""), may very well do something useful regardless
> of the formatting part based on other args.

I am sorry, I did not pay attention enough to that specific topic. I
was just finding warnings on next and pu, so I wondered how to fix it.

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